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How does metabolomics help scientists study chemical changes inside cells?

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Diagram illustrating metabolism with two sections: anabolic reaction on the left shows energy used to build larger molecules from smaller ones, while catabolic reaction on the right shows larger molecules breaking down into smaller molecules with energy released. — Metabolomics In anabolic reactions, a cell uses energy to combine small molecules into larger molecules. In catabolic reactions, molecules are broken down, and energy is released.

Metabolomics is the study of metabolites—the chemical substances produced through metabolism—which allows scientists to define observable molecular characteristics, or phenotypes, associated with cellular activity.1

By analyzing metabolite profiles, researchers obtain amplified readouts of subtle changes within complex cellular machinery. This is particularly valuable for understanding disease mechanisms, such as how cancer cells alter their metabolic pathways to survive or how mutations in enzymes can lead to the production of unusual metabolites that act as biomarkers or carcinogens.2

Scientists primarily use two complementary analytical methods to study these chemical changes:

Nuclear magnetic resonance (NMR) spectroscopy: A rapid technique that preserves specimen integrity, though it has limited sensitivity and detects fewer metabolites.3
Mass spectrometry (MS): Offers high sensitivity and specificity, making it effective for studying diverse molecules like lipids, though it often requires complex sample extraction protocols.3

Because the metabolome is chemically diverse, metabolomics remains a specialized field that provides insights into health and disease that DNA or proteins alone cannot reveal.13